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In processing polymers, injection moulding process is almost similar to extrusion process except for the screw operation.(a) True(b) FalseI have been asked this question during an interview.This key question is from Extrusion in Polymers topic in portion Moulding with Polymers of Casting-Forming-Welding II

Answer»

Correct answer is (a) True

Explanation: Injection moulding PROCESS is similar to extrusion process. The only difference between the two processes is in the screw operation. In extrusion, screw ROTATES continuously which provides OUTPUT of continuous products like pipe, rod and sheet. A reciprocating screw is used in injection moulding which rotates while moving in FORWARD and BACKWARD directions.



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